Addon breaks my online banking Portal (OAuth error)

[FelixBuehler]

Describe the bug
When trying to log in into my online banking portal (GLS Bank), I get this error afterwards:

OAuth Error
error="invalid_grant", error_description="Invalid redirect: https%3A%2F%2Fwww.gls-online-filiale.de%2Fservices_cloud%2Fportal%2Flogin does not match one of the registered values."

To Reproduce
Activate the addon and try to log in (account needed though)

Expected behavior
A normal login without problems

System Information

• Vivaldi 5.3.2679.70 (Chromium 102.0.5005.167)
• Windows 10 x64

Don't know how I can help any further, without offering my account credentials.

[ner00]

This to me seems extremely odd for the simple reason that the extension only works on google domains. That being said, I don't doubt the report that the extension may be interfering indirectly, but I'm not sure why that would be the case.

Is this problem reproducible with any other Chromium-based browser or Firefox?

[FelixBuehler]

Hey,

no, i can't reproduce the error with Chrome or Firefox. But the error is the same with another online banking portal from vrbank.de (they probably use the same engine, since both those banks collaborate).

Maybe they use some OAuth feature from google? Dont know if that exists, but that would be my first guess.